Lemuel pope jenks



L. -P. J ENKS.

COMBINATION PADLOOK.

(ModeL) Patented June 22, 1886.

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UNITED STATES PATENT @FFlQE.

LEMUEL POPE JENKS, OF BOSTON, MASSACHUSETTS.

COMBlNATlON-PADLOCK.

SPECIFICATION forming part of Letters Patent No. 344,109, dated June 22, 1886.

Application filed August 31, 1885. Serial No. 175,839.

'To aZZ whom it may concern.-

Be it known that I, LEMUEL Porn J ENKS, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, haveinvented a new and useful Improvement in Gombination-Padlocks, of which the following is a specification.

The nature of my invention is that of a combination-padlock capable of permutation by the change of relative location of three or more sliding bars, adapting it to a similar change in an appropriate key, to which are added devices for keeping the bars in place in the lock; and the object is to furnish a cheap, easily-0perated, and secure fastening.

In the drawings, Figure 1 is a view in perspective of my padlock. Fig. 2 is a view of the same in vertical cross-section. Fig. 3 is a view in perspective of the key to the padlock. Fig. 4 is aside view of the hasp to the padlock. Fig. 5 is a top view of the five respective lock-bars of the padlock.

In the drawings, A, Fig. 1, is the padlockcase, made, preferably, of a solid piece of metal bored with (in this case) five holes, called the lock-bar holes, which are afterward broached to a square shape, as seen at the left-hand edge of the padlock. In these holes are placed the lock-bars B B B B B, Fig. 2, (seen in top view in Fig. 5,) numbered I to V, in which figure the lock-bars are seen to bear, respectively, a notch, (squarein this case; but I sometimes make them the shape of a half-circle in top view,) which notches are placed, respectively, at distances from the right-hand ends of the lock-bars varying in regular proportion.

G C G G 0, Fig. 2, are springs lying, respectively, in the lock-bar holes, and in operation compressed by the insertion in the latter of the key-rods D D D D D, Fig. 3, and the pressure of thelock-bars to the right, and on the with drawal of the key-rods pressing the lock'bars forward to the left.

E, Figs. 1 and 2, is the bar-guard-a rod of metal which passes, in a round aperture made for it in the padlock-case, down from the top of the case nearly to the bottom of the same, (but not passing through the bottom,) across the lock-bar holes, and thus holding the lockbarsin their respective holes. The bar-guard (ModeL) seen to be bent at right angles and flattened at its top, where the horizontal portion rests on the top edge of the padlock-case A and passes in a groove under or in the lower edge of a projection, F Fig. 2, called the barguard cover, from the left-hand side of the ring of the hasp F, (see Fig. 1,) the bar-guard being thus prevented from removal when the hasp is down and locked. (I sometimes provide the right-hand end of this flat projecting portion of the bar-guard, as seen in Fig. 2, with a knob on the under side, entering into a cavity in the upper edge of the case A, to hold the bar-guard in place when the hasp is drawn up.)

F, Fig. 4, side view, is the hasp, seen in Fig. 2 to be composed in part of the ring at the upper end,which ring is out across at the righthand side, where its end bears a pin, G, entering into a cavityin the upper end of a projection beneath it from the top edge of the case A, which projectionv forms part of the complete circle of the ring. This ring has attached to its lower end the hasp proper, which is a square metal bar or a flat strip, (sometimes round,) seen in Fig. 4 to be provided at regular intervals with notches of size permitting the lock bars to slide readily through them.

H, Fig. 4, is a screw which passes through the back of the lock-case A, its smoothed end entering into aslot in the back of the notched hasp proper. The use of this screw is to prevent the entire detachment of the hasp from the lock-case A whenthe hasp is unlocked. The key X Fig. 3, is a plate of steel or of spring-brass furnished with a ring, S, at the top end, and bent as shown, and appropriately grooved at regular intervals on the inner sides where the two edges of the plate meet, and holds five rods, D D D D D, (orany othercon venient number, as may be desired,) of different lengths, called the key rods. The curved rear edge of the bent plate is seen to be bored with apertures, through which, the meeting sides of the plate being pressed open with the point of a penknife, the key-rods can be withdrawnand again replaced. The lengths of the key-rods are such that when the rods in unlocking the padlock are pressed into the square holes seen. at the edge of the lock-case 5 A in Fig. 1 they press back the lock-bars B B, &c.,respectivelyeach key-rod acting upon 1 the lock-bar to which itslength is adjustedto such a distance and no farther as will put all the notches in a line, thusadmitting the,

locks.

Operation: The mannerin which the notches of the lock-bars, when pressed back by the key-rods as their differing locations on the loclnbars require, lie in one line, thus permitting the passage by them of the notched hasp, needs no special explanation. It is evident that if the key-rods D D, 850., are not arranged in correspondence with the lock bars, the lock-bar notches will not beplaced in line and the hasp cannot be withdrawn, and the arrangement of thekey-rods being kept secret, the lock is practically inviolable. It is apparent that the number of lock-bars used can be increased to any reasonable extent, thus increasing th chances against unauthorized opening. With the number of lock-bars at live, the optional changes are one hundred and twenty in number, sufficient for ordinary use. When it is desired to have a new look, virtu- 'dinary manner with padlock-escutcheons.

I claim- 1. The bar guardE, in combination with the lock-bars and their springs, the lock-case, and a hasp, all constructed and arranged substantially as shown and described.

2. The bar-guard E, in combination with the lock-bars and their springs, the lock-case 5 and a hasp, and the bar-guard cover F projecting from the hasp, all constructed and arranged substantially as shown and described.

3. The herein-described key, composed of a bent-up plate of elastic sheet metal,havingap- 6o ertures at the point of bending to admit the insertion and withdrawal of the key-rods, respectively, in combination with said key-rods of different lengths, all constructed and arranged subsfantially as shown and described.

.LEMUEL POPE J ENKS.

Witnesses:

TIMOTHY W. SoANNnLL, CHAS. B. J. Roor. 

